Ticket #24257: query.php.patch

query.php

@@ -175 +175 @@
  * @since 2.0.0
  * @uses $wp_query
  *
+ * @param mixed $attachment Attachment ID, title, slug, or array of such.
  * @return bool
  */
-function is_attachment() {
+function is_attachment( $attachment = '' ) {
         global $wp_query;
 
         if ( ! isset( $wp_query ) ) {
@@ -185 +186 @@
                 return false;
         }
 
-        return $wp_query->is_attachment();
+        return $wp_query->is_attachment( $attachment );
 }
 
 /**
@@ -3108 +3109 @@
          *
          * @since 3.1.0
          *
+         * @param mixed $attachment Attachment ID, title, slug, or array of such.         
          * @return bool
          */
-        function is_attachment() {
-                return (bool) $this->is_attachment;
+        function is_attachment( $attachment = '' ) {
+                if ( !$this->is_attachment )
+                        return false;
+
+                if ( empty( $attachment ) )
+                        return true;
+
+                $attachment = (array) $attachment;
+
+                $post_obj = $this->get_queried_object();
+
+                if ( in_array( $post_obj->ID, $attachment ) )
+                        return true;
+                elseif ( in_array( $post_obj->post_title, $attachment ) )
+                        return true;
+                elseif ( in_array( $post_obj->post_name, $attachment ) )
+                        return true;
+
+                return false;
         }
 
         /**